Concept Guide

Table Of Contents
Configure Spanning Tree............................................................................................................................................... 831
Important Points to Remember................................................................................................................................... 832
Configuring Interfaces for Layer 2 Mode..................................................................................................................833
Enabling Spanning Tree Protocol Globally................................................................................................................ 834
Adding an Interface to the Spanning Tree Group...................................................................................................835
Modifying Global Parameters.......................................................................................................................................836
Modifying Interface STP Parameters........................................................................................................................ 836
Enabling PortFast............................................................................................................................................................837
Prevent Network Disruptions with BPDU Guard.............................................................................................. 838
Selecting STP Root........................................................................................................................................................ 840
STP Root Guard.............................................................................................................................................................. 840
Root Guard Scenario................................................................................................................................................840
Configuring Root Guard........................................................................................................................................... 841
Enabling SNMP Traps for Root Elections and Topology Changes......................................................................842
Configuring Spanning Trees as Hitless...................................................................................................................... 842
STP Loop Guard.............................................................................................................................................................. 842
Configuring Loop Guard.......................................................................................................................................... 843
Displaying STP Guard Configuration.......................................................................................................................... 844
Chapter 52: SupportAssist........................................................................................................ 845
Configuring SupportAssist Using a Configuration Wizard.................................................................................... 845
Configuring SupportAssist Manually.......................................................................................................................... 846
Configuring SupportAssist Activity.............................................................................................................................847
Configuring SupportAssist Company......................................................................................................................... 849
Configuring SupportAssist Person..............................................................................................................................849
Configuring SupportAssist Server.............................................................................................................................. 850
Viewing SupportAssist Configuration......................................................................................................................... 851
Chapter 53: System Time and Date............................................................................................853
Network Time Protocol................................................................................................................................................. 853
Protocol Overview.................................................................................................................................................... 854
Configure the Network Time Protocol.................................................................................................................854
Enabling NTP..............................................................................................................................................................854
Configuring NTP Broadcasts................................................................................................................................. 855
Disabling NTP on an Interface............................................................................................................................... 855
Configuring a Source IP Address for NTP Packets..........................................................................................855
Configuring NTP Authentication........................................................................................................................... 856
Configuring a Custom-defined Period for NTP time Synchronization.........................................................858
Configuring NTP control key password...............................................................................................................858
Configuring the NTP Step-Threshold.................................................................................................................. 858
Dell EMC Networking OS Time and Date................................................................................................................. 859
Configuration Task List .......................................................................................................................................... 859
Setting the Time and Date for the Switch Software Clock........................................................................... 859
Setting the Timezone...............................................................................................................................................859
Set Daylight Saving Time........................................................................................................................................ 860
Setting Daylight Saving Time Once......................................................................................................................860
Setting Recurring Daylight Saving Time..............................................................................................................860
Chapter 54: Tunneling............................................................................................................... 862
Contents
25